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/* Copyright (c) 2006, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
options {
JAVA_UNICODE_ESCAPE = true;
}
PARSER_BEGIN(JavaParser)
public class JavaParser {
public static void main(String args[]) {
JavaParser parser;
if (args.length == 0) {
System.out.println("Java Parser Version 1.1: Reading from standard input . . .");
parser = new JavaParser(System.in);
} else if (args.length == 1) {
System.out.println("Java Parser Version 1.1: Reading from file " + args[0] + " . . .");
try {
parser = new JavaParser(new java.io.FileInputStream(args[0]));
} catch (java.io.FileNotFoundException e) {
System.out.println("Java Parser Version 1.1: File " + args[0] + " not found.");
return;
}
} else {
System.out.println("Java Parser Version 1.1: Usage is one of:");
System.out.println(" java JavaParser < inputfile");
System.out.println("OR");
System.out.println(" java JavaParser inputfile");
return;
}
try {
parser.CompilationUnit();
System.out.println("Java Parser Version 1.1: Java program parsed successfully.");
} catch (ParseException e) {
System.out.println(e.getMessage());
System.out.println("Java Parser Version 1.1: Encountered errors during parse.");
}
}
// Semantic lookahead rules follow.
// implements: LOOKAHEAD( ( "abstract" | "final" | "public" )* "class" )
static boolean isClassDeclaration() {
int curTok = 1;
Token tok;
while (true) {
tok = getToken(curTok);
switch (tok.kind) {
case ABSTRACT:
case FINAL:
case PUBLIC:
curTok++;
break;
case CLASS:
return true;
default:
return false;
}
}
}
// implements: LOOKAHEAD(2) for Initializer()
static boolean isInitializer() {
Token tok = getToken(1);
if (tok.kind == LBRACE) return true;
if (tok.kind == STATIC) {
tok = getToken(2);
if (tok.kind == LBRACE) return true;
}
return false;
}
// implements: LOOKAHEAD( ( "static" | "abstract" | "final" | "public" | "protected" | "private" )* "class" )
static boolean isNestedClassDeclaration() {
int curTok = 1;
Token tok;
while (true) {
tok = getToken(curTok);
switch (tok.kind) {
case STATIC:
case ABSTRACT:
case FINAL:
case PUBLIC:
case PROTECTED:
case PRIVATE:
curTok++;
break;
case CLASS:
return true;
default:
return false;
}
}
}
// implements: LOOKAHEAD( ( "static" | "abstract" | "final" | "public" | "protected" | "private" )* "interface" )
static boolean isNestedInterfaceDeclaration() {
int curTok = 1;
Token tok;
while (true) {
tok = getToken(curTok);
switch (tok.kind) {
case STATIC:
case ABSTRACT:
case FINAL:
case PUBLIC:
case PROTECTED:
case PRIVATE:
curTok++;
break;
case INTERFACE:
return true;
default:
return false;
}
}
}
// implements: LOOKAHEAD( [ "public" | "protected" | "private" ] Name() "(" )
static boolean isConstructorDeclaration() {
int curTok = 1;
Token tok;
tok = getToken(1);
switch (tok.kind) {
case PUBLIC:
case PROTECTED:
case PRIVATE:
curTok = 2;
}
tok = getToken(curTok++);
if (tok.kind != IDENTIFIER) return false;
while (true) {
tok = getToken(curTok++);
if (tok.kind == LPAREN) return true;
if (tok.kind != DOT) return false;
tok = getToken(curTok++);
if (tok.kind != IDENTIFIER) return false;
}
}
// Returns true if the next set of tokens cannot be a field declaration.
// Returns false if the next set of tokens cannot be a method declaration.
// Note how this method is used in the grammar. We don't have to do a
// comprehensive check like we have done in the lookahead methods above.
// This show (therefore) another way you can implement lookahead methods.
// The way we do it is to see if we can find a "(" before either a "=" or
// a ";", in which case we return true.
static boolean isMethodDeclaration() {
int curTok = 1;
Token tok;
while (true) {
tok = getToken(curTok++);
switch (tok.kind) {
case LPAREN:
return true;
case ASSIGN:
case SEMICOLON:
case EOF:
return false;
}
}
}
// Checks that there is a "," and then there is no "}" following that.
static boolean moreVariableInitializers() {
return getToken(1).kind == COMMA && getToken(2).kind != RBRACE;
}
// Checks that this is a constructor invocation as opposed to a block
// statement.
static boolean isConstructorInvocation() {
int curTok = 1;
Token tok = getToken(1);
switch (tok.kind) {
case THIS:
case SUPER:
// We are assuming here that if the statement starts with "this"
// or "super", and the next token is "(", then it has to be a
// constructor invocation.
return getToken(2).kind == LPAREN;
case STRING_LITERAL:
case LPAREN:
case NEW:
case IDENTIFIER:
// Now move across tokens until the end of the statement - the
// first semicolon not nested within any kind of parentheses.
// If a "super(" is matched also not nested and before this
// semicolon, we return true. Otherwise return false.
int nestingLevel = 0;
while (true) {
tok = getToken(curTok++);
switch (tok.kind) {
case SEMICOLON:
if (nestingLevel == 0) {
return false;
}
break;
case SUPER:
if (nestingLevel == 0) {
return getToken(curTok).kind == LPAREN;
}
break;
case LPAREN:
case LBRACE:
case LBRACKET:
nestingLevel++;
break;
case RPAREN:
case RBRACE:
case RBRACKET:
nestingLevel--;
break;
case EOF:
return false;
}
}
default:
return false;
}
}
// Returns true if this is a primitive type (or an array of primitive
// type) cast.
static boolean isPrimitiveTypeCast() {
if (getToken(1).kind != LPAREN) return false;
Token tok = getToken(2);
switch (tok.kind) {
case BOOLEAN:
case CHAR:
case BYTE:
case SHORT:
case INT:
case LONG:
case FLOAT:
case DOUBLE:
return true;
}
return false;
}
// Returns true if this is a type cast.
static boolean isTypeCast() {
if (isPrimitiveTypeCast()) return true;
if (getToken(1).kind != LPAREN) return false;
int curTok = 2;
Token tok = getToken(curTok++);
if (tok.kind != IDENTIFIER) return false;
while (true) {
tok = getToken(curTok++);
if (tok.kind != DOT) break;
tok = getToken(curTok++);
if (tok.kind != IDENTIFIER) return false;
}
if (tok.kind == RPAREN) {
tok = getToken(curTok);
switch (tok.kind) {
case TILDE:
case BANG:
case LPAREN:
case IDENTIFIER:
case THIS:
case SUPER:
case NEW:
case INTEGER_LITERAL:
case FLOATING_POINT_LITERAL:
case CHARACTER_LITERAL:
case STRING_LITERAL:
case TRUE:
case FALSE:
case NULL:
return true;
}
return false;
} else {
if (tok.kind != LBRACKET) return false;
tok = getToken(curTok);
if (tok.kind != RBRACKET) return false;
return true;
}
}
// Distinguishes between ClassSelector and Name.
static boolean isClassSelector() {
int curTok = 1;
Token tok = getToken(curTok++);
if (tok.kind != IDENTIFIER) return true;
while (true) {
tok = getToken(curTok++);
while (tok.kind == LBRACKET) {
// A simple loop to accept "[]"s. We are a little sloppy
// in that we don't require it to be at the end, but then
// this is only a lookahead check.
tok = getToken(curTok++);
if (tok.kind != RBRACKET) return false;
tok = getToken(curTok++);
}
if (tok.kind != DOT) return false;
tok = getToken(curTok++);
if (tok.kind == CLASS) return true;
if (tok.kind != IDENTIFIER) return false;
}
}
// implements: LOOKAHEAD([ "final" ] Type() )
static boolean isLocalVariableDeclaration() {
int curTok = 1;
Token tok = getToken(curTok++);
if (tok.kind == FINAL) tok = getToken(curTok++);
switch (tok.kind) {
case BOOLEAN:
case CHAR:
case BYTE:
case SHORT:
case INT:
case LONG:
case FLOAT:
case DOUBLE:
tok = getToken(curTok++);
break;
case IDENTIFIER:
while (true) {
tok = getToken(curTok++);
if (tok.kind != DOT) break;
tok = getToken(curTok++);
if (tok.kind != IDENTIFIER) return false;
}
break;
default:
return false;
}
while (tok.kind == LBRACKET) {
tok = getToken(curTok++);
if (tok.kind != RBRACKET) return false;
tok = getToken(curTok++);
}
return tok.kind == IDENTIFIER;
}
static boolean isPrimarySuffix() {
Token tok = getToken(1);
if (tok.kind == LPAREN || tok.kind == LBRACKET) return true;
if (tok.kind == DOT) {
tok = getToken(2);
switch (tok.kind) {
case THIS:
case NEW:
case IDENTIFIER:
return true;
}
}
return false;
}
}
PARSER_END(JavaParser)
/* WHITE SPACE */
SKIP :
{
" "
| "\t"
| "\n"
| "\r"
| "\f"
}
/* COMMENTS */
MORE :
{
"//" : IN_SINGLE_LINE_COMMENT
|
<"/**" ~["/"]> { input_stream.backup(1); } : IN_FORMAL_COMMENT
|
"/*" : IN_MULTI_LINE_COMMENT
}
SPECIAL_TOKEN :
{
: DEFAULT
}
SPECIAL_TOKEN :
{
: DEFAULT
}
SPECIAL_TOKEN :
{
: DEFAULT
}
MORE :
{
< ~[] >
}
/* RESERVED WORDS AND LITERALS */
TOKEN :
{
< ABSTRACT: "abstract" >
| < BOOLEAN: "boolean" >
| < BREAK: "break" >
| < BYTE: "byte" >
| < CASE: "case" >
| < CATCH: "catch" >
| < CHAR: "char" >
| < CLASS: "class" >
| < CONST: "const" >
| < CONTINUE: "continue" >
| < _DEFAULT: "default" >
| < DO: "do" >
| < DOUBLE: "double" >
| < ELSE: "else" >
| < EXTENDS: "extends" >
| < FALSE: "false" >
| < FINAL: "final" >
| < FINALLY: "finally" >
| < FLOAT: "float" >
| < FOR: "for" >
| < GOTO: "goto" >
| < IF: "if" >
| < IMPLEMENTS: "implements" >
| < IMPORT: "import" >
| < INSTANCEOF: "instanceof" >
| < INT: "int" >
| < INTERFACE: "interface" >
| < LONG: "long" >
| < NATIVE: "native" >
| < NEW: "new" >
| < NULL: "null" >
| < PACKAGE: "package">
| < PRIVATE: "private" >
| < PROTECTED: "protected" >
| < PUBLIC: "public" >
| < RETURN: "return" >
| < SHORT: "short" >
| < STATIC: "static" >
| < SUPER: "super" >
| < SWITCH: "switch" >
| < SYNCHRONIZED: "synchronized" >
| < THIS: "this" >
| < THROW: "throw" >
| < THROWS: "throws" >
| < TRANSIENT: "transient" >
| < TRUE: "true" >
| < TRY: "try" >
| < VOID: "void" >
| < VOLATILE: "volatile" >
| < WHILE: "while" >
}
/* LITERALS */
TOKEN :
{
< INTEGER_LITERAL:
(["l","L"])?
| (["l","L"])?
| (["l","L"])?
>
|
< #DECIMAL_LITERAL: ["1"-"9"] (["0"-"9"])* >
|
< #HEX_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+ >
|
< #OCTAL_LITERAL: "0" (["0"-"7"])* >
|
< FLOATING_POINT_LITERAL:
(["0"-"9"])+ "." (["0"-"9"])* ()? (["f","F","d","D"])?
| "." (["0"-"9"])+ ()? (["f","F","d","D"])?
| (["0"-"9"])+ (["f","F","d","D"])?
| (["0"-"9"])+ ()? ["f","F","d","D"]
>
|
< #EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"])+ >
|
< CHARACTER_LITERAL:
"'"
( (~["'","\\","\n","\r"])
| ("\\"
( ["n","t","b","r","f","\\","'","\""]
| ["0"-"7"] ( ["0"-"7"] )?
| ["0"-"3"] ["0"-"7"] ["0"-"7"]
)
)
)
"'"
>
|
< STRING_LITERAL:
"\""
( (~["\"","\\","\n","\r"])
| ("\\"
( ["n","t","b","r","f","\\","'","\""]
| ["0"-"7"] ( ["0"-"7"] )?
| ["0"-"3"] ["0"-"7"] ["0"-"7"]
)
)
)*
"\""
>
}
/* IDENTIFIERS */
TOKEN :
{
< IDENTIFIER: (|)* >
|
< #LETTER:
[
"\u0024",
"\u0041"-"\u005a",
"\u005f",
"\u0061"-"\u007a",
"\u00c0"-"\u00d6",
"\u00d8"-"\u00f6",
"\u00f8"-"\u00ff",
"\u0100"-"\u1fff",
"\u3040"-"\u318f",
"\u3300"-"\u337f",
"\u3400"-"\u3d2d",
"\u4e00"-"\u9fff",
"\uf900"-"\ufaff"
]
>
|
< #DIGIT:
[
"\u0030"-"\u0039",
"\u0660"-"\u0669",
"\u06f0"-"\u06f9",
"\u0966"-"\u096f",
"\u09e6"-"\u09ef",
"\u0a66"-"\u0a6f",
"\u0ae6"-"\u0aef",
"\u0b66"-"\u0b6f",
"\u0be7"-"\u0bef",
"\u0c66"-"\u0c6f",
"\u0ce6"-"\u0cef",
"\u0d66"-"\u0d6f",
"\u0e50"-"\u0e59",
"\u0ed0"-"\u0ed9",
"\u1040"-"\u1049"
]
>
}
/* SEPARATORS */
TOKEN :
{
< LPAREN: "(" >
| < RPAREN: ")" >
| < LBRACE: "{" >
| < RBRACE: "}" >
| < LBRACKET: "[" >
| < RBRACKET: "]" >
| < SEMICOLON: ";" >
| < COMMA: "," >
| < DOT: "." >
}
/* OPERATORS */
TOKEN :
{
< ASSIGN: "=" >
| < GT: ">" >
| < LT: "<" >
| < BANG: "!" >
| < TILDE: "~" >
| < HOOK: "?" >
| < COLON: ":" >
| < EQ: "==" >
| < LE: "<=" >
| < GE: ">=" >
| < NE: "!=" >
| < SC_OR: "||" >
| < SC_AND: "&&" >
| < INCR: "++" >
| < DECR: "--" >
| < PLUS: "+" >
| < MINUS: "-" >
| < STAR: "*" >
| < SLASH: "/" >
| < BIT_AND: "&" >
| < BIT_OR: "|" >
| < XOR: "^" >
| < REM: "%" >
| < LSHIFT: "<<" >
| < RSIGNEDSHIFT: ">>" >
| < RUNSIGNEDSHIFT: ">>>" >
| < PLUSASSIGN: "+=" >
| < MINUSASSIGN: "-=" >
| < STARASSIGN: "*=" >
| < SLASHASSIGN: "/=" >
| < ANDASSIGN: "&=" >
| < ORASSIGN: "|=" >
| < XORASSIGN: "^=" >
| < REMASSIGN: "%=" >
| < LSHIFTASSIGN: "<<=" >
| < RSIGNEDSHIFTASSIGN: ">>=" >
| < RUNSIGNEDSHIFTASSIGN: ">>>=" >
}
/*****************************************
* THE JAVA LANGUAGE GRAMMAR STARTS HERE *
*****************************************/
/*
* Program structuring syntax follows.
*/
void CompilationUnit() :
{}
{
[ PackageDeclaration() ]
( ImportDeclaration() )*
(
LOOKAHEAD(1, | | | | | )
TypeDeclaration()
)*
}
void PackageDeclaration() :
{}
{
"package" Name() ";"
}
void ImportDeclaration() :
{}
{
"import" Name() [ "." "*" ] ";"
}
void TypeDeclaration() :
{}
{
LOOKAHEAD( { isClassDeclaration() } )
ClassDeclaration()
|
InterfaceDeclaration()
|
";"
}
/*
* Declaration syntax follows.
*/
void ClassDeclaration() :
{}
{
( "abstract" | "final" | "public" )*
UnmodifiedClassDeclaration()
}
void UnmodifiedClassDeclaration() :
{}
{
"class" [ "extends" Name() ] [ "implements" NameList() ]
ClassBody()
}
void ClassBody() :
{}
{
"{"
(
LOOKAHEAD(1, | | | | | |
| | | | | |
| | | | |
| | | | |
)
ClassBodyDeclaration()
)*
"}"
}
void NestedClassDeclaration() :
{}
{
( "static" | "abstract" | "final" | "public" | "protected" | "private" )*
UnmodifiedClassDeclaration()
}
void ClassBodyDeclaration() :
{}
{
LOOKAHEAD( { isInitializer() } )
Initializer()
|
LOOKAHEAD( { isNestedClassDeclaration() } )
NestedClassDeclaration()
|
LOOKAHEAD( { isNestedInterfaceDeclaration() } )
NestedInterfaceDeclaration()
|
LOOKAHEAD( { isConstructorDeclaration() } )
ConstructorDeclaration()
|
LOOKAHEAD( { isMethodDeclaration() } )
MethodDeclaration()
|
FieldDeclaration()
}
void InterfaceDeclaration() :
{}
{
( "abstract" | "public" )*
UnmodifiedInterfaceDeclaration()
}
void NestedInterfaceDeclaration() :
{}
{
( "static" | "abstract" | "final" | "public" | "protected" | "private" )*
UnmodifiedInterfaceDeclaration()
}
void UnmodifiedInterfaceDeclaration() :
{}
{
"interface" [ "extends" NameList() ]
"{"
(
LOOKAHEAD(1, | | | | | |
| | | | | |
| | | | |
| | | | )
InterfaceMemberDeclaration()
)*
"}"
}
void InterfaceMemberDeclaration() :
{}
{
LOOKAHEAD( { isNestedClassDeclaration() } )
NestedClassDeclaration()
|
LOOKAHEAD( { isNestedInterfaceDeclaration() } )
NestedInterfaceDeclaration()
|
LOOKAHEAD( { isMethodDeclaration() } )
MethodDeclaration()
|
FieldDeclaration()
}
void FieldDeclaration() :
{}
{
( "public" | "protected" | "private" | "static" | "final" | "transient" | "volatile" )*
Type() VariableDeclarator() ( "," VariableDeclarator() )* ";"
}
void VariableDeclarator() :
{}
{
VariableDeclaratorId() [ "=" VariableInitializer() ]
}
void VariableDeclaratorId() :
{}
{
( "[" "]" )*
}
void VariableInitializer() :
{}
{
ArrayInitializer()
|
LOOKAHEAD(1, | | | | | | |
| | | | | | |
| | |
| | | |
| | | | | )
Expression()
}
void ArrayInitializer() :
{}
{
"{"
[
LOOKAHEAD(1, | | | | | | |
| | | | | | |
| | |
| | | |
| | | | | | )
VariableInitializer()
( LOOKAHEAD( { getToken(1).kind == COMMA && getToken(2).kind != RBRACE } )
"," VariableInitializer()
)*
]
[ "," ]
"}"
}
void MethodDeclaration() :
{}
{
( "public" | "protected" | "private" | "static" | "abstract" | "final" | "native" | "synchronized" )*
ResultType() MethodDeclarator() [ "throws" NameList() ]
( Block() | ";" )
}
void MethodDeclarator() :
{}
{
FormalParameters() ( "[" "]" )*
}
void FormalParameters() :
{}
{
"(" [ FormalParameter() ( "," FormalParameter() )* ] ")"
}
void FormalParameter() :
{}
{
[ "final" ] Type() VariableDeclaratorId()
}
void ConstructorDeclaration() :
{}
{
[ "public" | "protected" | "private" ]
FormalParameters() [ "throws" NameList() ]
"{"
[ LOOKAHEAD( { isConstructorInvocation() } ) ExplicitConstructorInvocation() ]
(
LOOKAHEAD(1, | | | | | |
| | | | | | |
| | | | | | |
| | | | | |
| | | |
| | | |
| | | )
BlockStatement()
)*
"}"
}
void ExplicitConstructorInvocation() :
{}
{
LOOKAHEAD( { getToken(1).kind == THIS && getToken(2).kind == LPAREN } )
"this" Arguments() ";"
|
LOOKAHEAD(1, | | | | | | |
| | | | | | |
| | |
| | | )
[
LOOKAHEAD( { getToken(1).kind != SUPER || getToken(2).kind != LPAREN } )
PrimaryExpression() "."
]
"super" Arguments() ";"
}
void Initializer() :
{}
{
[ "static" ] Block()
}
/*
* Type, name and expression syntax follows.
*/
void Type() :
{}
{
( PrimitiveType() | Name() ) ( "[" "]" )*
}
void PrimitiveType() :
{}
{
"boolean"
|
"char"
|
"byte"
|
"short"
|
"int"
|
"long"
|
"float"
|
"double"
}
void ResultType() :
{}
{
"void"
|
Type()
}
void Name() :
{}
{
( LOOKAHEAD( { getToken(1).kind == DOT && getToken(2).kind == IDENTIFIER } )
"."
)*
}
void NameList() :
{}
{
Name()
( "," Name()
)*
}
/*
* Expression syntax follows.
*/
void Expression() :
/*
* This expansion has been written this way instead of:
* Assignment() | ConditionalExpression()
* for performance reasons.
* However, it is a weakening of the grammar for it allows the LHS of
* assignments to be any conditional expression whereas it can only be
* a primary expression. Consider adding a semantic predicate to work
* around this.
*/
{}
{
ConditionalExpression()
[
AssignmentOperator() Expression()
]
}
void AssignmentOperator() :
{}
{
"=" | "*=" | "/=" | "%=" | "+=" | "-=" | "<<=" | ">>=" | ">>>=" | "&=" | "^=" | "|="
}
void ConditionalExpression() :
{}
{
ConditionalOrExpression() [ "?" Expression() ":" ConditionalExpression() ]
}
void ConditionalOrExpression() :
{}
{
ConditionalAndExpression() ( "||" ConditionalAndExpression() )*
}
void ConditionalAndExpression() :
{}
{
InclusiveOrExpression() ( "&&" InclusiveOrExpression() )*
}
void InclusiveOrExpression() :
{}
{
ExclusiveOrExpression() ( "|" ExclusiveOrExpression() )*
}
void ExclusiveOrExpression() :
{}
{
AndExpression() ( "^" AndExpression() )*
}
void AndExpression() :
{}
{
EqualityExpression() ( "&" EqualityExpression() )*
}
void EqualityExpression() :
{}
{
InstanceOfExpression() ( ( "==" | "!=" ) InstanceOfExpression() )*
}
void InstanceOfExpression() :
{}
{
RelationalExpression() [ "instanceof" Type() ]
}
void RelationalExpression() :
{}
{
ShiftExpression() ( ( "<" | ">" | "<=" | ">=" ) ShiftExpression() )*
}
void ShiftExpression() :
{}
{
AdditiveExpression() ( ( "<<" | ">>" | ">>>" ) AdditiveExpression() )*
}
void AdditiveExpression() :
{}
{
MultiplicativeExpression() ( ( "+" | "-" ) MultiplicativeExpression() )*
}
void MultiplicativeExpression() :
{}
{
UnaryExpression() ( ( "*" | "/" | "%" ) UnaryExpression() )*
}
void UnaryExpression() :
{}
{
( "+" | "-" ) UnaryExpression()
|
PreIncrementExpression()
|
PreDecrementExpression()
|
LOOKAHEAD(1, | | | | | |
| | | | | | |
| | | |
| | |
| | )
UnaryExpressionNotPlusMinus()
}
void PreIncrementExpression() :
{}
{
"++" PrimaryExpression()
}
void PreDecrementExpression() :
{}
{
"--" PrimaryExpression()
}
void UnaryExpressionNotPlusMinus() :
{}
{
( "~" | "!" ) UnaryExpression()
|
LOOKAHEAD( { isTypeCast() } )
CastExpression()
|
LOOKAHEAD(1, | | | | | |
| | | | | | |
| | | |
| | | )
PostfixExpression()
}
void PostfixExpression() :
{}
{
PrimaryExpression() [ "++" | "--" ]
}
void CastExpression() :
{}
{
LOOKAHEAD( { isPrimitiveTypeCast() } )
"(" Type() ")" UnaryExpression()
|
"(" Type() ")" UnaryExpressionNotPlusMinus()
}
void PrimaryExpression() :
{}
{
PrimaryPrefix() ( LOOKAHEAD( { isPrimarySuffix() } ) PrimarySuffix() )*
}
void PrimaryPrefix() :
{}
{
Literal()
|
"this"
|
"super" "."
|
"(" Expression() ")"
|
LOOKAHEAD(1, )
AllocationExpression()
|
LOOKAHEAD( { isClassSelector() } )
ResultType() "." "class"
|
Name()
}
void PrimarySuffix() :
{}
{
LOOKAHEAD( { getToken(1).kind == DOT && getToken(2).kind == THIS } )
"." "this"
|
LOOKAHEAD( { getToken(1).kind == DOT && getToken(2).kind == NEW } )
"." AllocationExpression()
|
"[" Expression() "]"
|
"."
|
Arguments()
}
void Literal() :
{}
{
|
|
|
|
BooleanLiteral()
|
NullLiteral()
}
void BooleanLiteral() :
{}
{
"true"
|
"false"
}
void NullLiteral() :
{}
{
"null"
}
void Arguments() :
{}
{
"("
[
LOOKAHEAD(1, | | | | | |
| |